src/ab/plugins/db/rds.py [381:387]:
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    def sample(self, table_name: str, total_count: int):
        '''
        args:
            total_count: total row count of target partitions or whole table
        returns:
            sample_rate, sample_count, sample_data
        '''
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src/ab/plugins/db/rds.py [417:423]:
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    def sample(self, table_name: str, total_count: int):
        '''
        args:
            total_count: total row count of target partitions or whole table
        returns:
            sample_rate, sample_count, sample_data
        '''
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